RGO may refer to:

• Rada Główna Opiekuńcza (Central Welfare Council), a Polish social organization during the German occupation of WWI and WWII
• Revolutionäre Gewerkschafts Opposition (Revolutionary Union Opposition), a Communist trade union during Germany's Weimar Republic
• Russkoye Geograficheskoye Obshchestvo (Russian Geographical Society), a Russian scholarly association

• Royal Greenwich Observatory (now Royal Observatory, Greenwich), Greenwich Park, London, England
• Orang Airport, North Hamgyong Province, North Korea (by IATA code)

• Reciprocating gait orthosis, a type of leg brace
• Reduced graphene oxide, a form of graphene
• Ruchnaya Granata Oboronitel'naya (Hand Grenade Defensive), a Soviet weapon

This disambiguation page lists articles associated with the title RGO.
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